How did you set up the other computer you tried this on? Did you download a fresh ProntoEdit install file to that computer or did you move the install files from your other computer to the next computer? Are you having any other problems with your computer? Do you have a third computer to try this on? If you do try installing ProntoEdit from a fresh download then upload from the Pronto to the computer and see what you get. Try a new cable if your Pronto is not recognized.